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<a name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> com.googlecode.transloader.test.function;
<a name="2" href="#2">2</a>   
<a name="3" href="#3">3</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Constructor;
<a name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.InvocationTargetException;
<a name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Method;
<a name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Modifier;
<a name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="8" href="#8">8</a>   <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a name="9" href="#9">9</a>   <strong class="jxr_keyword">import</strong> java.util.List;
<a name="10" href="#10">10</a>  
<a name="11" href="#11">11</a>  <strong class="jxr_keyword">import</strong> junit.extensions.ActiveTestSuite;
<a name="12" href="#12">12</a>  <strong class="jxr_keyword">import</strong> junit.framework.Test;
<a name="13" href="#13">13</a>  
<a name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.lang.StringUtils;
<a name="15" href="#15">15</a>  
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> com.googlecode.transloader.Assert;
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">import</strong> com.googlecode.transloader.test.BaseTestCase;
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> com.googlecode.transloader.test.ProductionClassFinder;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> com.googlecode.transloader.test.Triangulate;
<a name="20" href="#20">20</a>  
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">NullParameterRejectionTest</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../com/googlecode/transloader/test/BaseTestCase.html">BaseTestCase</a> {
<a name="22" href="#22">22</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Class PRODUCTION_ASSERT_CLASS = Assert.<strong class="jxr_keyword">class</strong>;
<a name="23" href="#23">23</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String PRODUCTION_PACKAGE_NAME = PRODUCTION_ASSERT_CLASS.getPackage().getName();
<a name="24" href="#24">24</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String TEST_PACKAGE_NAME = <span class="jxr_string">"com.googlecode.transloader.test"</span>;
<a name="25" href="#25">25</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Class[] ALL_PRODUCTION_CLASSES =
<a name="26" href="#26">26</a>  			ProductionClassFinder.getAllProductionClasses(PRODUCTION_ASSERT_CLASS, TEST_PACKAGE_NAME);
<a name="27" href="#27">27</a>  
<a name="28" href="#28">28</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a> {
<a name="29" href="#29">29</a>  		String methodDescription;
<a name="30" href="#30">30</a>  		<strong class="jxr_keyword">int</strong> paramNumber;
<a name="31" href="#31">31</a>  
<a name="32" href="#32">32</a>  		ExemptParam(String methodDescription, <strong class="jxr_keyword">int</strong> paramNumber) {
<a name="33" href="#33">33</a>  			<strong class="jxr_keyword">this</strong>.methodDescription = methodDescription;
<a name="34" href="#34">34</a>  			<strong class="jxr_keyword">this</strong>.paramNumber = paramNumber;
<a name="35" href="#35">35</a>  		}
<a name="36" href="#36">36</a>  
<a name="37" href="#37">37</a>  		<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> equals(Object obj) {
<a name="38" href="#38">38</a>  			ExemptParam other = (ExemptParam) obj;
<a name="39" href="#39">39</a>  			<strong class="jxr_keyword">return</strong> StringUtils.contains(methodDescription, other.methodDescription) &amp;&amp; paramNumber == other.paramNumber;
<a name="40" href="#40">40</a>  		}
<a name="41" href="#41">41</a>  	}
<a name="42" href="#42">42</a>  
<a name="43" href="#43">43</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> List EXEMPT_PARAMS =
<a name="44" href="#44">44</a>  			Arrays.asList(<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>[] {
<a name="45" href="#45">45</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"DefaultTransloader.wrap(java.lang.Class)"</span>, 0),
<a name="46" href="#46">46</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"ClassWrapper(java.lang.Class)"</span>, 0),
<a name="47" href="#47">47</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"InvocationDescription(java.lang.String,java.lang.Class,java.lang.Object)"</span>, 2),
<a name="48" href="#48">48</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"InvocationDescription(java.lang.String,java.lang.String,java.lang.Object)"</span>, 2),
<a name="49" href="#49">49</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"InvocationDescription(java.lang.reflect.Method,java.lang.Object[])"</span>, 1),
<a name="50" href="#50">50</a>  					<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/function/NullParameterRejectionTest.html">ExemptParam</a>(<span class="jxr_string">"ObjectWrapper(java.lang.Object,com.googlecode.transloader.clone.CloningStrategy)"</span>,
<a name="51" href="#51">51</a>  							0),});
<a name="52" href="#52">52</a>  
<a name="53" href="#53">53</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> Test suite() <strong class="jxr_keyword">throws</strong> Exception {
<a name="54" href="#54">54</a>  		<strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> ActiveTestSuite(NullParameterRejectionTest.<strong class="jxr_keyword">class</strong>);
<a name="55" href="#55">55</a>  	}
<a name="56" href="#56">56</a>  
<a name="57" href="#57">57</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testAllPublicMethodsRejectNullParameters() <strong class="jxr_keyword">throws</strong> Exception {
<a name="58" href="#58">58</a>  		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; ALL_PRODUCTION_CLASSES.length; i++) {
<a name="59" href="#59">59</a>  			Class productionClass = ALL_PRODUCTION_CLASSES[i];
<a name="60" href="#60">60</a>  			<strong class="jxr_keyword">if</strong> (isPublicConcreteClassOtherThanAssert(productionClass))
<a name="61" href="#61">61</a>  				assertPublicMethodsRejectNullParameters(productionClass);
<a name="62" href="#62">62</a>  		}
<a name="63" href="#63">63</a>  	}
<a name="64" href="#64">64</a>  
<a name="65" href="#65">65</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testAllPublicConstuctorsRejectNullParameters() <strong class="jxr_keyword">throws</strong> Exception {
<a name="66" href="#66">66</a>  		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; ALL_PRODUCTION_CLASSES.length; i++) {
<a name="67" href="#67">67</a>  			Class productionClass = ALL_PRODUCTION_CLASSES[i];
<a name="68" href="#68">68</a>  			<strong class="jxr_keyword">if</strong> (isPublicConcreteClassOtherThanAssert(productionClass))
<a name="69" href="#69">69</a>  				assertPublicConstuctorsRejectNullParameters(productionClass);
<a name="70" href="#70">70</a>  		}
<a name="71" href="#71">71</a>  	}
<a name="72" href="#72">72</a>  
<a name="73" href="#73">73</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> isPublicConcreteClassOtherThanAssert(Class productionClass) {
<a name="74" href="#74">74</a>  		<strong class="jxr_keyword">return</strong> !productionClass.isInterface() &amp;&amp; Modifier.isPublic(productionClass.getModifiers()) &amp;&amp; productionClass != PRODUCTION_ASSERT_CLASS;
<a name="75" href="#75">75</a>  	}
<a name="76" href="#76">76</a>  
<a name="77" href="#77">77</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertPublicMethodsRejectNullParameters(Class productionClass) <strong class="jxr_keyword">throws</strong> Exception {
<a name="78" href="#78">78</a>  		Object instance = Triangulate.anyInstanceOf(productionClass);
<a name="79" href="#79">79</a>  		Method[] methods = productionClass.getMethods();
<a name="80" href="#80">80</a>  		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; methods.length; i++) {
<a name="81" href="#81">81</a>  			Method method = methods[i];
<a name="82" href="#82">82</a>  			<strong class="jxr_keyword">if</strong> (method.getDeclaringClass().getPackage().getName().startsWith(PRODUCTION_PACKAGE_NAME))
<a name="83" href="#83">83</a>  				assertRejectsNullParameters(instance, methods[i]);
<a name="84" href="#84">84</a>  		}
<a name="85" href="#85">85</a>  	}
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertRejectsNullParameters(<strong class="jxr_keyword">final</strong> Object instance, <strong class="jxr_keyword">final</strong> Method method) <strong class="jxr_keyword">throws</strong> Exception {
<a name="88" href="#88">88</a>  		Class[] parameterTypes = method.getParameterTypes();
<a name="89" href="#89">89</a>  		List nonNullParameters = getNonNullParameters(parameterTypes);
<a name="90" href="#90">90</a>  		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; parameterTypes.length; i++) {
<a name="91" href="#91">91</a>  			<strong class="jxr_keyword">if</strong> (shouldTestNullRejectionForParameter(method, parameterTypes, i)) {
<a name="92" href="#92">92</a>  				List parameters = <strong class="jxr_keyword">new</strong> ArrayList(nonNullParameters);
<a name="93" href="#93">93</a>  				parameters.set(i, <strong class="jxr_keyword">null</strong>);
<a name="94" href="#94">94</a>  				assertExceptionThrownFromInvoking(instance, method, parameters);
<a name="95" href="#95">95</a>  			}
<a name="96" href="#96">96</a>  		}
<a name="97" href="#97">97</a>  	}
<a name="98" href="#98">98</a>  
<a name="99" href="#99">99</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertExceptionThrownFromInvoking(<strong class="jxr_keyword">final</strong> Object instance, <strong class="jxr_keyword">final</strong> Method method, <strong class="jxr_keyword">final</strong> List parameters) {
<a name="100" href="#100">100</a> 		dump(method.toString() + parameters);
<a name="101" href="#101">101</a> 		Thrower thrower = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/BaseTestCase.html">Thrower</a>() {
<a name="102" href="#102">102</a> 			<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> executeUntilThrow() <strong class="jxr_keyword">throws</strong> Throwable {
<a name="103" href="#103">103</a> 				method.invoke(instance, parameters.toArray());
<a name="104" href="#104">104</a> 			}
<a name="105" href="#105">105</a> 		};
<a name="106" href="#106">106</a> 		assertThrows(thrower, <strong class="jxr_keyword">new</strong> InvocationTargetException(<strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="107" href="#107">107</a> 				<span class="jxr_string">"Expecting no null parameters but received "</span> + parameters + <span class="jxr_string">"."</span>)));
<a name="108" href="#108">108</a> 	}
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertPublicConstuctorsRejectNullParameters(Class productionClass) {
<a name="111" href="#111">111</a> 		Constructor[] constructors = productionClass.getConstructors();
<a name="112" href="#112">112</a> 		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; constructors.length; i++) {
<a name="113" href="#113">113</a> 			assertRejectsNullParameters(constructors[i]);
<a name="114" href="#114">114</a> 		}
<a name="115" href="#115">115</a> 	}
<a name="116" href="#116">116</a> 
<a name="117" href="#117">117</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertRejectsNullParameters(Constructor constructor) {
<a name="118" href="#118">118</a> 		Class[] parameterTypes = constructor.getParameterTypes();
<a name="119" href="#119">119</a> 		List nonNullParameters = getNonNullParameters(parameterTypes);
<a name="120" href="#120">120</a> 		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; parameterTypes.length; i++) {
<a name="121" href="#121">121</a> 			<strong class="jxr_keyword">if</strong> (shouldTestNullRejectionForParameter(constructor, parameterTypes, i)) {
<a name="122" href="#122">122</a> 				List parameters = <strong class="jxr_keyword">new</strong> ArrayList(nonNullParameters);
<a name="123" href="#123">123</a> 				parameters.set(i, <strong class="jxr_keyword">null</strong>);
<a name="124" href="#124">124</a> 				assertExceptionThrownFromInvoking(constructor, parameters);
<a name="125" href="#125">125</a> 			}
<a name="126" href="#126">126</a> 		}
<a name="127" href="#127">127</a> 	}
<a name="128" href="#128">128</a> 
<a name="129" href="#129">129</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> assertExceptionThrownFromInvoking(<strong class="jxr_keyword">final</strong> Constructor constructor, <strong class="jxr_keyword">final</strong> List parameters) {
<a name="130" href="#130">130</a> 		dump(constructor.toString() + parameters);
<a name="131" href="#131">131</a> 		Thrower thrower = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/transloader/test/BaseTestCase.html">Thrower</a>() {
<a name="132" href="#132">132</a> 			<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> executeUntilThrow() <strong class="jxr_keyword">throws</strong> Throwable {
<a name="133" href="#133">133</a> 				constructor.newInstance(parameters.toArray());
<a name="134" href="#134">134</a> 			}
<a name="135" href="#135">135</a> 		};
<a name="136" href="#136">136</a> 		assertThrows(thrower, <strong class="jxr_keyword">new</strong> InvocationTargetException(<strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="137" href="#137">137</a> 				<span class="jxr_string">"Expecting no null parameters but received "</span>)));
<a name="138" href="#138">138</a> 	}
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a> 	<strong class="jxr_keyword">private</strong> List getNonNullParameters(Class[] parameterTypes) {
<a name="141" href="#141">141</a> 		List nonNullParameters = <strong class="jxr_keyword">new</strong> ArrayList();
<a name="142" href="#142">142</a> 		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; parameterTypes.length; i++) {
<a name="143" href="#143">143</a> 			Class parameterType = parameterTypes[i];
<a name="144" href="#144">144</a> 			nonNullParameters.add(Triangulate.anyInstanceOf(parameterType));
<a name="145" href="#145">145</a> 		}
<a name="146" href="#146">146</a> 		<strong class="jxr_keyword">return</strong> nonNullParameters;
<a name="147" href="#147">147</a> 	}
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> shouldTestNullRejectionForParameter(Object methodOrConstructor, Class[] parameterTypes, <strong class="jxr_keyword">int</strong> i) {
<a name="150" href="#150">150</a> 		<strong class="jxr_keyword">return</strong> !(parameterTypes[i].isPrimitive() || EXEMPT_PARAMS.contains(<strong class="jxr_keyword">new</strong> ExemptParam(
<a name="151" href="#151">151</a> 				methodOrConstructor.toString(), i)));
<a name="152" href="#152">152</a> 	}
<a name="153" href="#153">153</a> }
</pre>
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